BIOMED SCAN is an imaging test that does not use radiation (x-rays). It uses magnets and radio waves to create images of brain structures. It can detect some types of stroke at their earliest stages by measuring the movement of water molecules in the brain. It can also show damage to the brain caused by a stroke, tumor or an accident. It is a safe procedure for most people. However, it is important to tell the health care provider if you have a history of any metal objects in your body or head (such as bullet wounds). The MRI machine’s magnetic field may cause these objects to move, which could affect the results.
Inside the Brain: A Guide to Understanding Cerebral MRI
Before the procedure, you should wear a hospital gown and remove any jewelry or other objects with metal (such as hairpins). You will be given a pair of earplugs to protect your ears from noise during the scan. You will be asked to lie down on a table. If you are afraid of closed spaces, your healthcare provider may give you medicine to help you relax or offer an “open” MRI, in which the scanner is not as close to your body. You will be asked to lie very still during the scan. You can bring a friend or family member into the room with you if you wish.
Some MRI exams require an injection of contrast dye. The dye helps the provider find certain brain abnormalities and improves the quality of the images. The contrast material contains a rare earth metal called gadolinium. If you have kidney disease, you are at a higher risk of developing a condition called nephrogenic systemic fibrosis after receiving the contrast agent.